You don't need anything hormonal. Go with the DermaTherm.
Higher Testosterone in males can aid in fat loss, yes, but it's not the be all or end all of it - there is a lot more involved.
DermaTherm can be used anywhere - I personally use it ALL OVER, like a body moistorizer. Do remember that fat loss is going to occur from all over - and that your NUTRITION AND TRAINING are going to be the keys for this; supplements are just the icing on the top of an already made cake.